Portable basketball system



FIG. 1 is a perspective view of a new design for a portable basketball system showing environment related to the claimed design;

FIG. 2 is a close-up perspective view of the new design;

FIG. 3 is a front view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is a rear view thereof; and,

FIG. 6 is a top view thereof.

The broken lines are included for the purpose of illustrating the portions of the portable basketball system and its environment that form no part of the claimed design. The appearance within the unshaded areas defined by solid lines likewise forms no part of the claimed design. 

CLAIM The ornamental design for a portable basketball system, as shown and described. 